4.3.1-compat ultrasn0w update

MuscleNerd has tweeted that an updated version of Ultrasn0w would be released tonight. The unlock 4.3.1 will be compatible with iPhone 4 and iPhone 3GS. Using this update, users will be able to first upgrade to 06.15 Baseband and then would be able to downgrade to 05.13 Basebands. This surely is an important update as users on Basebands 05.14,…